Changes in Ecclesiastical Jurisdictions in Slovenia

Date	Change
300	Diocese of Ptuj was established
380	Diocese of Emona was established
400	Diocese of Ptuj was suppressed
520	Diocese of Emona was suppressed (to establish Diocese of Cittanova)
520	Diocese of Koper was established (became suffragan of Aquileia)
1461.12.06	Diocese of Ljubljana was restored (from Patriarchal See of Aquileia and became suffragan of Aquileia)
1611.11.21	Apostolic Vicariate of Marča (Croatian Rite) was established (from Diocese of Zagreb)
1777.06.17	Apostolic Vicariate of Marča (Croatian Rite) was promoted as Diocese of Gornji Tkalec (became suffragan of Esztergom)
1787	Diocese of Ljubljana lost territory to Diocese of Gurk
1788.03.08	Diocese of Ljubljana was promoted as Metropolitan Archdiocese of Ljubljana (with suffragan sees Gradisca, Koper, Poreč and Pula and gained territory from the suppressed Metropolitan Archdiocese of Gorizia)
1801	Diocese of Gornji Tkalec (Croatian Rite) was renamed as Diocese of Križevci
1807.08.19	Metropolitan Archdiocese of Ljubljana was demoted as Diocese of Ljubljana (without ecclesiastical province)
1925.04.25	Diocese of Ljubljana lost territory to Diocese of Rijeka–Opatija
1932.02.20	Diocese of Ljubljana lost territory to Metropolitan Archdiocese of Gorizia e Gradisca, Metropolitan Archdiocese of Udine and Diocese of Trieste
1961.12.22	Diocese of Ljubljana was promoted as Archdiocese of Ljubljana
1962.03.05	Diocese of Maribor was established (from the suppressed Diocese of Lavant, gained title of Lavant and without ecclesiastical province)
1968.11.22	Archdiocese of Ljubljana was promoted as Metropolitan Archdiocese of Ljubljana (with suffragan see Maribor)
1977.10.17	Diocese of Koper exchanged territory with Diocese of Poreč i Pula and Diocese of Trieste
2000	Titular Episcopal See of Ptuj was restored
2006.04.07	Diocese of Celje was established (from Diocese of Maribor and became suffragan of Maribor)
2006.04.07	Diocese of Maribor was promoted as Metropolitan Archdiocese of Maribor (with suffragan sees Celje and Murska Sobota and lost territory to establish Diocese of Celje and Diocese of Murska Sobota)
2006.04.07	Diocese of Murska Sobota was established (from Diocese of Maribor and became suffragan of Maribor)
2006.04.07	Diocese of Novo Mesto was established (from Metropolitan Archdiocese of Ljubljana and became suffragan of Ljubljana)